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Commit | Line | Data |
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89eb8eb9 DN |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
45d9ca49 | 6 | * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved. |
89eb8eb9 DN |
7 | */ |
8 | ||
89eb8eb9 DN |
9 | /* |
10 | * Cross Partition Communication (XPC) partition support. | |
11 | * | |
12 | * This is the part of XPC that detects the presence/absence of | |
13 | * other partitions. It provides a heartbeat and monitors the | |
14 | * heartbeats of other partitions. | |
15 | * | |
16 | */ | |
17 | ||
261f3b49 DN |
18 | #include <linux/device.h> |
19 | #include <linux/hardirq.h> | |
5a0e3ad6 | 20 | #include <linux/slab.h> |
45d9ca49 | 21 | #include "xpc.h" |
c2c9f115 | 22 | #include <asm/uv/uv_hub.h> |
89eb8eb9 | 23 | |
89eb8eb9 DN |
24 | /* XPC is exiting flag */ |
25 | int xpc_exiting; | |
26 | ||
4b38fcd4 | 27 | /* this partition's reserved page pointers */ |
89eb8eb9 | 28 | struct xpc_rsvd_page *xpc_rsvd_page; |
04de7418 DN |
29 | static unsigned long *xpc_part_nasids; |
30 | unsigned long *xpc_mach_nasids; | |
89eb8eb9 | 31 | |
04de7418 DN |
32 | static int xpc_nasid_mask_nbytes; /* #of bytes in nasid mask */ |
33 | int xpc_nasid_mask_nlongs; /* #of longs in nasid mask */ | |
4b38fcd4 | 34 | |
bc63d387 | 35 | struct xpc_partition *xpc_partitions; |
89eb8eb9 | 36 | |
7aa6ba41 JS |
37 | /* |
38 | * Guarantee that the kmalloc'd memory is cacheline aligned. | |
39 | */ | |
7682a4c6 | 40 | void * |
7aa6ba41 JS |
41 | xpc_kmalloc_cacheline_aligned(size_t size, gfp_t flags, void **base) |
42 | { | |
43 | /* see if kmalloc will give us cachline aligned memory by default */ | |
44 | *base = kmalloc(size, flags); | |
2c2b94f9 | 45 | if (*base == NULL) |
7aa6ba41 | 46 | return NULL; |
2c2b94f9 DN |
47 | |
48 | if ((u64)*base == L1_CACHE_ALIGN((u64)*base)) | |
7aa6ba41 | 49 | return *base; |
2c2b94f9 | 50 | |
7aa6ba41 JS |
51 | kfree(*base); |
52 | ||
53 | /* nope, we'll have to do it ourselves */ | |
54 | *base = kmalloc(size + L1_CACHE_BYTES, flags); | |
2c2b94f9 | 55 | if (*base == NULL) |
7aa6ba41 | 56 | return NULL; |
2c2b94f9 | 57 | |
4a3ad2dd | 58 | return (void *)L1_CACHE_ALIGN((u64)*base); |
7aa6ba41 JS |
59 | } |
60 | ||
89eb8eb9 DN |
61 | /* |
62 | * Given a nasid, get the physical address of the partition's reserved page | |
63 | * for that nasid. This function returns 0 on any error. | |
64 | */ | |
a812dcc3 | 65 | static unsigned long |
27929029 | 66 | xpc_get_rsvd_page_pa(int nasid) |
89eb8eb9 | 67 | { |
908787db | 68 | enum xp_retval ret; |
89eb8eb9 | 69 | u64 cookie = 0; |
a812dcc3 | 70 | unsigned long rp_pa = nasid; /* seed with nasid */ |
261f3b49 | 71 | size_t len = 0; |
a812dcc3 DN |
72 | size_t buf_len = 0; |
73 | void *buf = buf; | |
27929029 | 74 | void *buf_base = NULL; |
a7665b0a RH |
75 | enum xp_retval (*get_partition_rsvd_page_pa) |
76 | (void *, u64 *, unsigned long *, size_t *) = | |
77 | xpc_arch_ops.get_partition_rsvd_page_pa; | |
89eb8eb9 | 78 | |
89eb8eb9 DN |
79 | while (1) { |
80 | ||
5b8669df DN |
81 | /* !!! rp_pa will need to be _gpa on UV. |
82 | * ??? So do we save it into the architecture specific parts | |
83 | * ??? of the xpc_partition structure? Do we rename this | |
84 | * ??? function or have two versions? Rename rp_pa for UV to | |
85 | * ??? rp_gpa? | |
86 | */ | |
a7665b0a | 87 | ret = get_partition_rsvd_page_pa(buf, &cookie, &rp_pa, &len); |
89eb8eb9 | 88 | |
261f3b49 DN |
89 | dev_dbg(xpc_part, "SAL returned with ret=%d, cookie=0x%016lx, " |
90 | "address=0x%016lx, len=0x%016lx\n", ret, | |
a812dcc3 | 91 | (unsigned long)cookie, rp_pa, len); |
89eb8eb9 | 92 | |
261f3b49 | 93 | if (ret != xpNeedMoreInfo) |
89eb8eb9 | 94 | break; |
89eb8eb9 | 95 | |
ea57f80c | 96 | /* !!! L1_CACHE_ALIGN() is only a sn2-bte_copy requirement */ |
c2c9f115 RH |
97 | if (is_shub()) |
98 | len = L1_CACHE_ALIGN(len); | |
99 | ||
100 | if (len > buf_len) { | |
101 | if (buf_base != NULL) | |
102 | kfree(buf_base); | |
27929029 | 103 | buf_len = L1_CACHE_ALIGN(len); |
a812dcc3 DN |
104 | buf = xpc_kmalloc_cacheline_aligned(buf_len, GFP_KERNEL, |
105 | &buf_base); | |
27929029 DN |
106 | if (buf_base == NULL) { |
107 | dev_err(xpc_part, "unable to kmalloc " | |
a812dcc3 | 108 | "len=0x%016lx\n", buf_len); |
261f3b49 | 109 | ret = xpNoMemory; |
27929029 DN |
110 | break; |
111 | } | |
89eb8eb9 DN |
112 | } |
113 | ||
c2c9f115 | 114 | ret = xp_remote_memcpy(xp_pa(buf), rp_pa, len); |
908787db DN |
115 | if (ret != xpSuccess) { |
116 | dev_dbg(xpc_part, "xp_remote_memcpy failed %d\n", ret); | |
89eb8eb9 DN |
117 | break; |
118 | } | |
119 | } | |
120 | ||
cbf283c0 | 121 | kfree(buf_base); |
27929029 | 122 | |
261f3b49 | 123 | if (ret != xpSuccess) |
89eb8eb9 | 124 | rp_pa = 0; |
2c2b94f9 | 125 | |
a812dcc3 | 126 | dev_dbg(xpc_part, "reserved page at phys address 0x%016lx\n", rp_pa); |
89eb8eb9 DN |
127 | return rp_pa; |
128 | } | |
129 | ||
89eb8eb9 DN |
130 | /* |
131 | * Fill the partition reserved page with the information needed by | |
132 | * other partitions to discover we are alive and establish initial | |
133 | * communications. | |
134 | */ | |
5b8669df | 135 | int |
94bd2708 | 136 | xpc_setup_rsvd_page(void) |
89eb8eb9 | 137 | { |
5b8669df | 138 | int ret; |
89eb8eb9 | 139 | struct xpc_rsvd_page *rp; |
a812dcc3 | 140 | unsigned long rp_pa; |
81fe7883 | 141 | unsigned long new_ts_jiffies; |
89eb8eb9 | 142 | |
89eb8eb9 DN |
143 | /* get the local reserved page's address */ |
144 | ||
27929029 | 145 | preempt_disable(); |
261f3b49 | 146 | rp_pa = xpc_get_rsvd_page_pa(xp_cpu_to_nasid(smp_processor_id())); |
27929029 | 147 | preempt_enable(); |
89eb8eb9 DN |
148 | if (rp_pa == 0) { |
149 | dev_err(xpc_part, "SAL failed to locate the reserved page\n"); | |
5b8669df | 150 | return -ESRCH; |
89eb8eb9 | 151 | } |
c2c9f115 | 152 | rp = (struct xpc_rsvd_page *)__va(xp_socket_pa(rp_pa)); |
89eb8eb9 | 153 | |
94bd2708 DN |
154 | if (rp->SAL_version < 3) { |
155 | /* SAL_versions < 3 had a SAL_partid defined as a u8 */ | |
156 | rp->SAL_partid &= 0xff; | |
157 | } | |
261f3b49 | 158 | BUG_ON(rp->SAL_partid != xp_partition_id); |
94bd2708 DN |
159 | |
160 | if (rp->SAL_partid < 0 || rp->SAL_partid >= xp_max_npartitions) { | |
161 | dev_err(xpc_part, "the reserved page's partid of %d is outside " | |
162 | "supported range (< 0 || >= %d)\n", rp->SAL_partid, | |
163 | xp_max_npartitions); | |
5b8669df | 164 | return -EINVAL; |
89eb8eb9 DN |
165 | } |
166 | ||
167 | rp->version = XPC_RP_VERSION; | |
94bd2708 | 168 | rp->max_npartitions = xp_max_npartitions; |
89eb8eb9 | 169 | |
4b38fcd4 DN |
170 | /* establish the actual sizes of the nasid masks */ |
171 | if (rp->SAL_version == 1) { | |
172 | /* SAL_version 1 didn't set the nasids_size field */ | |
94bd2708 | 173 | rp->SAL_nasids_size = 128; |
4b38fcd4 | 174 | } |
04de7418 DN |
175 | xpc_nasid_mask_nbytes = rp->SAL_nasids_size; |
176 | xpc_nasid_mask_nlongs = BITS_TO_LONGS(rp->SAL_nasids_size * | |
177 | BITS_PER_BYTE); | |
4b38fcd4 DN |
178 | |
179 | /* setup the pointers to the various items in the reserved page */ | |
180 | xpc_part_nasids = XPC_RP_PART_NASIDS(rp); | |
181 | xpc_mach_nasids = XPC_RP_MACH_NASIDS(rp); | |
89eb8eb9 | 182 | |
a7665b0a | 183 | ret = xpc_arch_ops.setup_rsvd_page(rp); |
5b8669df DN |
184 | if (ret != 0) |
185 | return ret; | |
89eb8eb9 DN |
186 | |
187 | /* | |
94bd2708 | 188 | * Set timestamp of when reserved page was setup by XPC. |
89eb8eb9 DN |
189 | * This signifies to the remote partition that our reserved |
190 | * page is initialized. | |
191 | */ | |
81fe7883 DN |
192 | new_ts_jiffies = jiffies; |
193 | if (new_ts_jiffies == 0 || new_ts_jiffies == rp->ts_jiffies) | |
194 | new_ts_jiffies++; | |
195 | rp->ts_jiffies = new_ts_jiffies; | |
89eb8eb9 | 196 | |
5b8669df DN |
197 | xpc_rsvd_page = rp; |
198 | return 0; | |
199 | } | |
200 | ||
201 | void | |
202 | xpc_teardown_rsvd_page(void) | |
203 | { | |
204 | /* a zero timestamp indicates our rsvd page is not initialized */ | |
205 | xpc_rsvd_page->ts_jiffies = 0; | |
89eb8eb9 DN |
206 | } |
207 | ||
89eb8eb9 | 208 | /* |
4b38fcd4 | 209 | * Get a copy of a portion of the remote partition's rsvd page. |
89eb8eb9 DN |
210 | * |
211 | * remote_rp points to a buffer that is cacheline aligned for BTE copies and | |
4b38fcd4 DN |
212 | * is large enough to contain a copy of their reserved page header and |
213 | * part_nasids mask. | |
89eb8eb9 | 214 | */ |
33ba3c77 | 215 | enum xp_retval |
04de7418 | 216 | xpc_get_remote_rp(int nasid, unsigned long *discovered_nasids, |
a812dcc3 | 217 | struct xpc_rsvd_page *remote_rp, unsigned long *remote_rp_pa) |
89eb8eb9 | 218 | { |
04de7418 | 219 | int l; |
908787db | 220 | enum xp_retval ret; |
89eb8eb9 | 221 | |
89eb8eb9 DN |
222 | /* get the reserved page's physical address */ |
223 | ||
27929029 | 224 | *remote_rp_pa = xpc_get_rsvd_page_pa(nasid); |
2c2b94f9 | 225 | if (*remote_rp_pa == 0) |
65c17b80 | 226 | return xpNoRsvdPageAddr; |
89eb8eb9 | 227 | |
4b38fcd4 | 228 | /* pull over the reserved page header and part_nasids mask */ |
a812dcc3 | 229 | ret = xp_remote_memcpy(xp_pa(remote_rp), *remote_rp_pa, |
04de7418 | 230 | XPC_RP_HEADER_SIZE + xpc_nasid_mask_nbytes); |
908787db DN |
231 | if (ret != xpSuccess) |
232 | return ret; | |
89eb8eb9 | 233 | |
89eb8eb9 | 234 | if (discovered_nasids != NULL) { |
04de7418 DN |
235 | unsigned long *remote_part_nasids = |
236 | XPC_RP_PART_NASIDS(remote_rp); | |
4b38fcd4 | 237 | |
04de7418 DN |
238 | for (l = 0; l < xpc_nasid_mask_nlongs; l++) |
239 | discovered_nasids[l] |= remote_part_nasids[l]; | |
89eb8eb9 DN |
240 | } |
241 | ||
81fe7883 DN |
242 | /* zero timestamp indicates the reserved page has not been setup */ |
243 | if (remote_rp->ts_jiffies == 0) | |
94bd2708 DN |
244 | return xpRsvdPageNotSet; |
245 | ||
89eb8eb9 | 246 | if (XPC_VERSION_MAJOR(remote_rp->version) != |
4a3ad2dd | 247 | XPC_VERSION_MAJOR(XPC_RP_VERSION)) { |
65c17b80 | 248 | return xpBadVersion; |
89eb8eb9 DN |
249 | } |
250 | ||
a47d5dac | 251 | /* check that both remote and local partids are valid for each side */ |
aaa3cd69 DN |
252 | if (remote_rp->SAL_partid < 0 || |
253 | remote_rp->SAL_partid >= xp_max_npartitions || | |
261f3b49 | 254 | remote_rp->max_npartitions <= xp_partition_id) { |
94bd2708 | 255 | return xpInvalidPartid; |
aaa3cd69 DN |
256 | } |
257 | ||
261f3b49 | 258 | if (remote_rp->SAL_partid == xp_partition_id) |
aaa3cd69 | 259 | return xpLocalPartid; |
94bd2708 | 260 | |
65c17b80 | 261 | return xpSuccess; |
89eb8eb9 DN |
262 | } |
263 | ||
a607c389 | 264 | /* |
a47d5dac DN |
265 | * See if the other side has responded to a partition deactivate request |
266 | * from us. Though we requested the remote partition to deactivate with regard | |
267 | * to us, we really only need to wait for the other side to disengage from us. | |
a607c389 DN |
268 | */ |
269 | int | |
270 | xpc_partition_disengaged(struct xpc_partition *part) | |
271 | { | |
64d032ba | 272 | short partid = XPC_PARTID(part); |
a607c389 DN |
273 | int disengaged; |
274 | ||
a7665b0a | 275 | disengaged = !xpc_arch_ops.partition_engaged(partid); |
a47d5dac | 276 | if (part->disengage_timeout) { |
a607c389 | 277 | if (!disengaged) { |
a47d5dac | 278 | if (time_is_after_jiffies(part->disengage_timeout)) { |
a607c389 DN |
279 | /* timelimit hasn't been reached yet */ |
280 | return 0; | |
281 | } | |
282 | ||
283 | /* | |
a47d5dac | 284 | * Other side hasn't responded to our deactivate |
a607c389 DN |
285 | * request in a timely fashion, so assume it's dead. |
286 | */ | |
287 | ||
a47d5dac DN |
288 | dev_info(xpc_part, "deactivate request to remote " |
289 | "partition %d timed out\n", partid); | |
290 | xpc_disengage_timedout = 1; | |
a7665b0a | 291 | xpc_arch_ops.assume_partition_disengaged(partid); |
a607c389 DN |
292 | disengaged = 1; |
293 | } | |
a47d5dac | 294 | part->disengage_timeout = 0; |
a607c389 DN |
295 | |
296 | /* cancel the timer function, provided it's not us */ | |
a47d5dac DN |
297 | if (!in_interrupt()) |
298 | del_singleshot_timer_sync(&part->disengage_timer); | |
a607c389 | 299 | |
83469b55 DN |
300 | DBUG_ON(part->act_state != XPC_P_AS_DEACTIVATING && |
301 | part->act_state != XPC_P_AS_INACTIVE); | |
302 | if (part->act_state != XPC_P_AS_INACTIVE) | |
a607c389 | 303 | xpc_wakeup_channel_mgr(part); |
a607c389 | 304 | |
a7665b0a | 305 | xpc_arch_ops.cancel_partition_deactivation_request(part); |
a607c389 DN |
306 | } |
307 | return disengaged; | |
308 | } | |
309 | ||
89eb8eb9 DN |
310 | /* |
311 | * Mark specified partition as active. | |
312 | */ | |
65c17b80 | 313 | enum xp_retval |
89eb8eb9 DN |
314 | xpc_mark_partition_active(struct xpc_partition *part) |
315 | { | |
316 | unsigned long irq_flags; | |
65c17b80 | 317 | enum xp_retval ret; |
89eb8eb9 | 318 | |
89eb8eb9 DN |
319 | dev_dbg(xpc_part, "setting partition %d to ACTIVE\n", XPC_PARTID(part)); |
320 | ||
321 | spin_lock_irqsave(&part->act_lock, irq_flags); | |
83469b55 DN |
322 | if (part->act_state == XPC_P_AS_ACTIVATING) { |
323 | part->act_state = XPC_P_AS_ACTIVE; | |
65c17b80 | 324 | ret = xpSuccess; |
89eb8eb9 | 325 | } else { |
65c17b80 | 326 | DBUG_ON(part->reason == xpSuccess); |
89eb8eb9 DN |
327 | ret = part->reason; |
328 | } | |
329 | spin_unlock_irqrestore(&part->act_lock, irq_flags); | |
330 | ||
331 | return ret; | |
332 | } | |
333 | ||
89eb8eb9 | 334 | /* |
a47d5dac | 335 | * Start the process of deactivating the specified partition. |
89eb8eb9 DN |
336 | */ |
337 | void | |
338 | xpc_deactivate_partition(const int line, struct xpc_partition *part, | |
65c17b80 | 339 | enum xp_retval reason) |
89eb8eb9 DN |
340 | { |
341 | unsigned long irq_flags; | |
89eb8eb9 | 342 | |
89eb8eb9 DN |
343 | spin_lock_irqsave(&part->act_lock, irq_flags); |
344 | ||
83469b55 | 345 | if (part->act_state == XPC_P_AS_INACTIVE) { |
89eb8eb9 DN |
346 | XPC_SET_REASON(part, reason, line); |
347 | spin_unlock_irqrestore(&part->act_lock, irq_flags); | |
65c17b80 | 348 | if (reason == xpReactivating) { |
89eb8eb9 | 349 | /* we interrupt ourselves to reactivate partition */ |
a7665b0a | 350 | xpc_arch_ops.request_partition_reactivation(part); |
89eb8eb9 DN |
351 | } |
352 | return; | |
353 | } | |
83469b55 | 354 | if (part->act_state == XPC_P_AS_DEACTIVATING) { |
65c17b80 DN |
355 | if ((part->reason == xpUnloading && reason != xpUnloading) || |
356 | reason == xpReactivating) { | |
89eb8eb9 DN |
357 | XPC_SET_REASON(part, reason, line); |
358 | } | |
359 | spin_unlock_irqrestore(&part->act_lock, irq_flags); | |
360 | return; | |
361 | } | |
362 | ||
83469b55 | 363 | part->act_state = XPC_P_AS_DEACTIVATING; |
89eb8eb9 DN |
364 | XPC_SET_REASON(part, reason, line); |
365 | ||
366 | spin_unlock_irqrestore(&part->act_lock, irq_flags); | |
367 | ||
a47d5dac | 368 | /* ask remote partition to deactivate with regard to us */ |
a7665b0a | 369 | xpc_arch_ops.request_partition_deactivation(part); |
89eb8eb9 | 370 | |
a47d5dac DN |
371 | /* set a timelimit on the disengage phase of the deactivation request */ |
372 | part->disengage_timeout = jiffies + (xpc_disengage_timelimit * HZ); | |
373 | part->disengage_timer.expires = part->disengage_timeout; | |
374 | add_timer(&part->disengage_timer); | |
89eb8eb9 | 375 | |
e54af724 DN |
376 | dev_dbg(xpc_part, "bringing partition %d down, reason = %d\n", |
377 | XPC_PARTID(part), reason); | |
89eb8eb9 | 378 | |
a607c389 | 379 | xpc_partition_going_down(part, reason); |
89eb8eb9 DN |
380 | } |
381 | ||
89eb8eb9 | 382 | /* |
a607c389 | 383 | * Mark specified partition as inactive. |
89eb8eb9 DN |
384 | */ |
385 | void | |
386 | xpc_mark_partition_inactive(struct xpc_partition *part) | |
387 | { | |
388 | unsigned long irq_flags; | |
389 | ||
89eb8eb9 DN |
390 | dev_dbg(xpc_part, "setting partition %d to INACTIVE\n", |
391 | XPC_PARTID(part)); | |
392 | ||
393 | spin_lock_irqsave(&part->act_lock, irq_flags); | |
83469b55 | 394 | part->act_state = XPC_P_AS_INACTIVE; |
89eb8eb9 DN |
395 | spin_unlock_irqrestore(&part->act_lock, irq_flags); |
396 | part->remote_rp_pa = 0; | |
397 | } | |
398 | ||
89eb8eb9 DN |
399 | /* |
400 | * SAL has provided a partition and machine mask. The partition mask | |
401 | * contains a bit for each even nasid in our partition. The machine | |
402 | * mask contains a bit for each even nasid in the entire machine. | |
403 | * | |
404 | * Using those two bit arrays, we can determine which nasids are | |
405 | * known in the machine. Each should also have a reserved page | |
406 | * initialized if they are available for partitioning. | |
407 | */ | |
408 | void | |
409 | xpc_discovery(void) | |
410 | { | |
411 | void *remote_rp_base; | |
412 | struct xpc_rsvd_page *remote_rp; | |
a812dcc3 | 413 | unsigned long remote_rp_pa; |
89eb8eb9 | 414 | int region; |
4b38fcd4 | 415 | int region_size; |
89eb8eb9 DN |
416 | int max_regions; |
417 | int nasid; | |
418 | struct xpc_rsvd_page *rp; | |
04de7418 | 419 | unsigned long *discovered_nasids; |
65c17b80 | 420 | enum xp_retval ret; |
89eb8eb9 | 421 | |
4b38fcd4 | 422 | remote_rp = xpc_kmalloc_cacheline_aligned(XPC_RP_HEADER_SIZE + |
04de7418 | 423 | xpc_nasid_mask_nbytes, |
4a3ad2dd | 424 | GFP_KERNEL, &remote_rp_base); |
2c2b94f9 | 425 | if (remote_rp == NULL) |
89eb8eb9 | 426 | return; |
2c2b94f9 | 427 | |
04de7418 | 428 | discovered_nasids = kzalloc(sizeof(long) * xpc_nasid_mask_nlongs, |
4a3ad2dd | 429 | GFP_KERNEL); |
89eb8eb9 DN |
430 | if (discovered_nasids == NULL) { |
431 | kfree(remote_rp_base); | |
432 | return; | |
433 | } | |
89eb8eb9 | 434 | |
4a3ad2dd | 435 | rp = (struct xpc_rsvd_page *)xpc_rsvd_page; |
89eb8eb9 DN |
436 | |
437 | /* | |
438 | * The term 'region' in this context refers to the minimum number of | |
439 | * nodes that can comprise an access protection grouping. The access | |
440 | * protection is in regards to memory, IOI and IPI. | |
441 | */ | |
261f3b49 | 442 | region_size = xp_region_size; |
4b38fcd4 | 443 | |
c22c7aef R |
444 | if (is_uv()) |
445 | max_regions = 256; | |
446 | else { | |
447 | max_regions = 64; | |
448 | ||
449 | switch (region_size) { | |
450 | case 128: | |
451 | max_regions *= 2; | |
452 | case 64: | |
453 | max_regions *= 2; | |
454 | case 32: | |
455 | max_regions *= 2; | |
456 | region_size = 16; | |
457 | DBUG_ON(!is_shub2()); | |
458 | } | |
4b38fcd4 | 459 | } |
89eb8eb9 DN |
460 | |
461 | for (region = 0; region < max_regions; region++) { | |
462 | ||
2c2b94f9 | 463 | if (xpc_exiting) |
89eb8eb9 | 464 | break; |
89eb8eb9 DN |
465 | |
466 | dev_dbg(xpc_part, "searching region %d\n", region); | |
467 | ||
4b38fcd4 | 468 | for (nasid = (region * region_size * 2); |
4a3ad2dd | 469 | nasid < ((region + 1) * region_size * 2); nasid += 2) { |
89eb8eb9 | 470 | |
2c2b94f9 | 471 | if (xpc_exiting) |
89eb8eb9 | 472 | break; |
89eb8eb9 DN |
473 | |
474 | dev_dbg(xpc_part, "checking nasid %d\n", nasid); | |
475 | ||
04de7418 | 476 | if (test_bit(nasid / 2, xpc_part_nasids)) { |
89eb8eb9 DN |
477 | dev_dbg(xpc_part, "PROM indicates Nasid %d is " |
478 | "part of the local partition; skipping " | |
479 | "region\n", nasid); | |
480 | break; | |
481 | } | |
482 | ||
04de7418 | 483 | if (!(test_bit(nasid / 2, xpc_mach_nasids))) { |
89eb8eb9 DN |
484 | dev_dbg(xpc_part, "PROM indicates Nasid %d was " |
485 | "not on Numa-Link network at reset\n", | |
486 | nasid); | |
487 | continue; | |
488 | } | |
489 | ||
04de7418 | 490 | if (test_bit(nasid / 2, discovered_nasids)) { |
89eb8eb9 DN |
491 | dev_dbg(xpc_part, "Nasid %d is part of a " |
492 | "partition which was previously " | |
493 | "discovered\n", nasid); | |
494 | continue; | |
495 | } | |
496 | ||
33ba3c77 | 497 | /* pull over the rsvd page header & part_nasids mask */ |
89eb8eb9 DN |
498 | |
499 | ret = xpc_get_remote_rp(nasid, discovered_nasids, | |
4a3ad2dd | 500 | remote_rp, &remote_rp_pa); |
65c17b80 | 501 | if (ret != xpSuccess) { |
89eb8eb9 DN |
502 | dev_dbg(xpc_part, "unable to get reserved page " |
503 | "from nasid %d, reason=%d\n", nasid, | |
504 | ret); | |
505 | ||
65c17b80 | 506 | if (ret == xpLocalPartid) |
89eb8eb9 | 507 | break; |
2c2b94f9 | 508 | |
89eb8eb9 DN |
509 | continue; |
510 | } | |
511 | ||
a7665b0a | 512 | xpc_arch_ops.request_partition_activation(remote_rp, |
a47d5dac | 513 | remote_rp_pa, nasid); |
89eb8eb9 DN |
514 | } |
515 | } | |
516 | ||
517 | kfree(discovered_nasids); | |
518 | kfree(remote_rp_base); | |
519 | } | |
520 | ||
89eb8eb9 DN |
521 | /* |
522 | * Given a partid, get the nasids owned by that partition from the | |
3a7d555b | 523 | * remote partition's reserved page. |
89eb8eb9 | 524 | */ |
65c17b80 | 525 | enum xp_retval |
64d032ba | 526 | xpc_initiate_partid_to_nasids(short partid, void *nasid_mask) |
89eb8eb9 DN |
527 | { |
528 | struct xpc_partition *part; | |
a812dcc3 | 529 | unsigned long part_nasid_pa; |
89eb8eb9 | 530 | |
89eb8eb9 | 531 | part = &xpc_partitions[partid]; |
2c2b94f9 | 532 | if (part->remote_rp_pa == 0) |
65c17b80 | 533 | return xpPartitionDown; |
89eb8eb9 | 534 | |
04de7418 | 535 | memset(nasid_mask, 0, xpc_nasid_mask_nbytes); |
4b38fcd4 | 536 | |
a812dcc3 | 537 | part_nasid_pa = (unsigned long)XPC_RP_PART_NASIDS(part->remote_rp_pa); |
89eb8eb9 | 538 | |
a812dcc3 | 539 | return xp_remote_memcpy(xp_pa(nasid_mask), part_nasid_pa, |
04de7418 | 540 | xpc_nasid_mask_nbytes); |
89eb8eb9 | 541 | } |